Sharpening machine



Ma y 29, 1923.

C. M. HUFF SHARPENING MACHINE 2 sheets-shat 2 Filed Jime 12. 1922 Patented May 29, 1923.

' UNITED. STATES,

CHARLES M. Hem, or iiLBI oN, WASHINGTON. 1', i

SHARPENING MACHINE.

. Application filed June 12, 192a. J seriailna sea'zee.

To all whom it may concern: I

Be it known that 1,.CHARLES M. HUFF, a carpenter, citizen of the United States, residing at Albion, in the county of Whitman and State of IVashington, have invented certain new and useful Improvements inSharpening Machines, of which the following is a specification.

This invention relates to a sharpening ma chine and has for'its principal object to produce a machine that can be easily transported and set up wheneverit is necessary to use the same, and which is particularly adapted for sharpeningband knives as used in threshing machines.

Another object of the invention is to providea sharpening machine of the above mentioned character that can be adjusted to va rious positions so as to accommodate various kindsand sizes of knives which may have. to be sharpened thereon. .1

A still further object of the invention is to produce a sharpening machine of the above mentioned character that can be knocked down and carried conveniently upon the farm implement with which it is to be used and which is providedwith means for adjusting the same to various positions-and which has driving means carried thereby.

that is adapted to be driven by the driving power used in the farming implement upon which the sharpening machine is carried.

A still further object 'of the invention is to provide a sharpening machine of the above mentioned character which is inexpensivein its manufacture, simple in construction, strong and durable.

Other objects and advantages of this invention will become apparent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like numerals designate like parts throughout the same Figure 1 is a front elevation of the invention.

Figure 2 is a side elevation of the same,

Figure 3 is a perspective view of the auxiliary frame, and

Figure 4 shows one of the bracing elements.

In the drawings, wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral 1 designates the base which consists of spaced longitudinal bars 2 and 3 which are held in 4 and 5.

bers 6 and 7 and a cross bar 10 is 'hingedly connected at its lower end to the basel by spaced relation by means of transverse bars i' A frame consisting of parallel side meman I means of suitable strap hinges '8 and 9. The

cross barlO is attached to the side members {Sand 7 at, their upper ends and crossed diagonally extending brace rods 11 and 12 are further secured to the side members 6 and T of the frame so as to hold thelsame 1n rig d position. Supporting elements B and ll arepivotally secured at their lower ends to .the base 1' andtheir free ends are providedwith elongated open slots 15-for the. purpose" of receiving threaded bolts 16 and 17 which are carried by the side members 6 and 7 of the frame. w The purpose .of these supportingelcments 13 and 14 is to adjustuthe'framc to permit the same to be held in a vertical position or at an angle to the' vertical as,

desired. N After the .frame has been adjusted .tothe proper-angle thumb nuts 18 and19 which are carried by the zboltssl6and 17 are then threaded on the bolts until sides of the bracin'g elements 13 and 14 to rigidly and securely hold the frame in the adjusted position. An auxiliary "frame 20 consisting of side rails 21 and 22 is braced by means of cross arms 23and24. Thesidein grooves formedin the inner sides of the side members-6 and 7 of the main frame.- It will therefore beseen' that the auxiliary they engage the i frame A is-slidably' mounted with-*relation to I the main frame for the to be fully described.

Carried by. the auxiliary frame 20 is a pulley wheel and bracket 27 which is'mounted upon the top edge of the lower cross arm purpose hereinafter 23. Secured to the under side of the cross arm 10 ofthe main frame is an eye 28 for the purpose of attaching one end ofthe.

cable 29 thereto. The cable is adapted to travel over the pulley wheel 27 and the end thereof opposite to the, end connected to the eye 28 is connected to a shaft30'which is carried by the main frame and held thereon by means of suitable bearing brackets 31. This shaft-3O has one end terminating in a crank 32, which extends beyond one side of the frame, whereby the shaft 30 may be readily rotated" to cause thecable 29 to be wound upon said shaft, which in turn will; cause the auxiliary frame to move longitudinally of the main frame and thereby increase or decrease the height of the auxiliary frame.

Journaled in suitable bearings 33 and 34, which are carried at the top of the auxiliary frame 20, is a shaft 35. These bearings 33 and 3a which support the shaft are secured to the auxiliary frame 20 by means of brackets 36. Secured to one end of the shaft 35 is a grinding wheel or sharpening wheel 37, which is held thereon by means of a suitable locking element 38. Arranged on the shaft between the side members 21 and 22 of the auxiliary frame 20 is a pulley wheel 39 and trained over this pulley wheel 39 is a suitable driving belt 4:0. To further prevent the shaft 35 upon which is mounted the sharpening .wheel 37 and the pulley 39, from side movement, suitable collars 41 and 42 are disposed on the shaft 35 and held thereon beside the side rails 21 and 22 of the auxiliary frame by set screws 43 and 44:.

Ordinarily the sharpening machine is carried upon the agricultural implement in a folded position and when it is desired to use the same for sharpening various implements on the machine or Whenever it is necessary to take the implements off the machine to sharpen them. the machine is taken from the agricultural implement upon which it is mounted and is set upon the ground in the manner shown in the drawings in Figs. 1 and 2. The belt l0 which drives the grind ing wheel mounted upon the shaft is connected with any suitable driving means and may be connected to the driving shaft of the agricultural implement upon which the machine is carried. Any suitable power may be employed to operate the sharpening machine. lVhenever it is necessary to adjust the main frame and auxiliary frame according to the desired angle, it can be readily done in the manner set forth in the-above description. The grinding machine can be easily set up for thepurpose: of grinding band knives or other implements desired and does not necessitate the use of a complicated and large machine.

It is. to be understood that the form of my invention herewith shown and described is to be taken as the preferred embodiment of the same and as various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention and the scope of the subjoined claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. A portable grinding machine comprising a base, a main frame hingedly carried by the base, an auxiliary frame slidablv mounted in the main frame, grinding means carried by the auxiliary frame, winding means carried by the main frame, and a flexible element connected to the winding means and to the auxiliary'frame, whereby upon movement of the winding means, the auxiliary frame will be raised or lowered within the main frame.

2'. A portable grinding machine comprising a base, a main frame hingedly secured to the base adjacent the forward end thereof including a pair of spaced uprights having channels formed in their inner faces defining guideways.. means carried by the base for engaging the swinging frame to'h-old' the same in adjusted relation to the base, an

auxiliary frame slidably associated with the main frame including side bars and laterally extending guide ribs mounted in said guide channels means for adjusting the auxiliary' frame in relation tothe main frame, azgrindin'g wheel rotatably carried by said auxiliary frame.

In' testimonyv whereof I afiix my signature in presence of-two witnesses;

CHARLES M. HUFF. Vitnesses:

CLEM I. Ronnnrs, Fmrnnniox W. HUFF. 

